jQuery事件:检测对div的html/text的更改

我有一个div，它的内容一直在变化，是ajax请求，jquery函数，模糊等。

是否有一种方法可以在任何时间点检测我的div上的任何变化?

我不想使用任何间隔或默认值检查。

这样就可以了

$('mydiv').contentchanged() {
 alert('changed')
}

当前回答

您可以将div的旧innerHTML存储在一个变量中。设置检查旧内容与当前内容是否匹配的时间间隔。如果这不是真的，那就做点什么。

2013-03-27 18:46:08

其他回答

试试MutationObserver:

https://developer.microsoft.com/en-us/microsoft-edge/platform/documentation/dev-guide/dom/mutation-observers/ https://developer.mozilla.org/en-US/docs/Web/API/MutationObserver

浏览器支持:http://caniuse.com/#feat=mutationobserver

<html>  <head> </head> <body> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script type="text/javascript"> // Inspect the array of MutationRecord objects to identify the nature of the change function mutationObjectCallback(mutationRecordsList) { console.log("mutationObjectCallback invoked."); mutationRecordsList.forEach(function(mutationRecord) { console.log("Type of mutation: " + mutationRecord.type); if ("attributes" === mutationRecord.type) { console.log("Old attribute value: " + mutationRecord.oldValue); } }); } // Create an observer object and assign a callback function var observerObject = new MutationObserver(mutationObjectCallback); // the target to watch, this could be #yourUniqueDiv // we use the body to watch for changes var targetObject = document.body; // Register the target node to observe and specify which DOM changes to watch observerObject.observe(targetObject, { attributes: true, attributeFilter: ["id", "dir"], attributeOldValue: true, childList: true }); // This will invoke the mutationObjectCallback function (but only after all script in this // scope has run). For now, it simply queues a MutationRecord object with the change information targetObject.appendChild(document.createElement('div')); // Now a second MutationRecord object will be added, this time for an attribute change targetObject.dir = 'rtl'; </script> </body> </html>

2016-11-21 14:58:09

使用MutationObserver，详见Mozilla提供的片段，并改编自这篇博客文章

或者，您也可以使用本链接中的JQuery示例

找到了，Chrome 18+，火狐14+

// Select the node that will be observed for mutations
var targetNode = document.getElementById('some-id');

// Options for the observer (which mutations to observe)
var config = { attributes: true, childList: true };

// Callback function to execute when mutations are observed
var callback = function(mutationsList) {
    for(var mutation of mutationsList) {
        if (mutation.type == 'childList') {
            console.log('A child node has been added or removed.');
        }
        else if (mutation.type == 'attributes') {
            console.log('The ' + mutation.attributeName + ' attribute was modified.');
        }
    }
};

// Create an observer instance linked to the callback function
var observer = new MutationObserver(callback);

// Start observing the target node for configured mutations
observer.observe(targetNode, config);

// Later, you can stop observing
observer.disconnect();

2018-05-23 17:20:00

尝试了上面给出的一些答案，但这些火灾发生了两次。如果你需要的话，这里有一个工作解决方案。

$('mydiv').one('DOMSubtreeModified', function(){
    console.log('changed');
});

2020-08-28 14:24:29

domsubtremodified不是一个好的解决方案。如果您决定在事件处理程序中更改DOM，它可能会导致无限循环，因此它在许多浏览器中已被禁用。MutationObserver是更好的答案。

MDN医生

const onChangeElement = (qSelector, cb)=>{
 const targetNode = document.querySelector(qSelector);
 if(targetNode){
    const config = { attributes: true, childList: false, subtree: false };
    const callback = function(mutationsList, observer) {
        cb($(qSelector))
    };
    const observer = new MutationObserver(callback);
    observer.observe(targetNode, config);
 }else {
    console.error("onChangeElement: Invalid Selector")
 }
}

你可以这样使用它，

onChangeElement('mydiv', function(jqueryElement){
   alert('changed')
})

2020-11-09 06:25:48

下面的代码为我工作:

$("body").on('DOMSubtreeModified', "mydiv", function() {
    alert('changed');
});

2017-03-22 10:26:55

jQuery事件:检测对div的html/text的更改

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